I use this rss format:
<?xml version="1.0" encoding="UTF-8" ?>
<rss version="2.0" xmlns:atom="http://www.w3.org/2005/Atom">
<channel><atom:link href="http://www.mysite.com/feed.php" rel="self" type="application/rss+xml" />
with this header:
header('Content-Disposition: inline; filename=feed.xml');
It works fine in IE and FF but in Chrome I see just the text, and tags are visible only as "view source", it doesn't appear as a valid rss page.
What wrong did I do?
As far as I can tell, Chrome doesn't have native support for RSS feeds and requires an (official) extension to handle them. Check this bug report for more info.
Yes, Chrome has never supported RSS. I suspect they decided it was on the way out quite a while back, and they seem to be pretty much right about that. Pity, though.